Rounded corner mattress foundation



FIG. 1 is a perspective view of a rounded corner mattress foundation according to my new design in a first environment of display;

FIG. 2 is a top view thereof;

FIG. 3 is an end view of a rounded corner mattress foundation of FIG. 1; the opposite end being a mirror image thereof;

FIG. 4 is a side view of a rounded corner mattress foundation of FIG. 1, the opposite end being a mirror image thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a perspective view of a rounded corner mattress foundation according to my new design in a second environment of display;

FIG. 7 is a top view thereof;

FIG. 8 is an end view of a rounded corner mattress foundation of FIG. 6; the opposite end being a mirror image thereof;

FIG. 9 is a side view of the rounded corner mattress foundation of FIG. 6, the opposite end being a mirror image thereof; and,

FIG. 10 is a bottom view thereof.

The broken lines illustrate the claim in use and form no part of the claimed design. 

CLAIM The ornamental design for a rounded corner mattress foundation, as shown and described. 